AN UNIDENTIFIED CHLORAMINE DECOMPOSITION PRODUCT .2. A PROPOSED FORMATION MECHANISM

This study proposed an empirical rate expression for the formation of an unidentified product generated in chloramine decomposition; the rat e expression was incorporated into an existing model describing the fa te and speciation in the chlorine-ammonia system. Specific rate consta nts were estimated based on experimental data and trial-and-errors com puting technique. A simple mechanism was proposed for formation of the unidentified product. This mechanism hypothesized that an intermediat e species was formed in the reactions of chloramine decomposition. The intermediate species was assumed reacting with nitrite to form the un identified product, it also might react with HOCl to form other end-pr oduct(s). Concentration of the intermediate species and nitrite formed were estimated by pseudo steady-state assumption in the chlorine-ammo nia system.